A Las Vegas Metropolitan Police officer stands in the intersection of Las Vegas Boulevard and Tropicana Ave. after the shooting, one of the victims of which lies on the ground behind him.Ethan Miller/Getty Images

5 of 21

A victim lies on the festival grounds.David Becker/Getty Images

6 of 21

People tend to the wounded outside the festival grounds.David Becker/Getty Images

7 of 21

Concertgoers carry a victim away from the scene after the shooting broke out.David Becker/Getty Images

8 of 21

A man in a wheelchair is taken away from the Route 91 Harvest country music festival after the shooting began.David Becker/Getty Images

9 of 21

A victim's body lies on the festival grounds.David Becker/Getty Images

10 of 21

People scramble for shelter after shots were heard.David Becker/Getty Images

11 of 21

An abandoned cowboy hat lays in the street after the concertgoers fled the scene.David Becker/Getty Images

12 of 21

Las Vegas police stand guard along the streets outside the the Route 91 Harvest country music festival grounds.David Becker/Getty Images

13 of 21

A body lies under a sheet as fire and rescue personnel gather at the intersection of Las Vegas Boulevard and Tropicana Ave.Ethan Miller/Getty Images

14 of 21

A man lays on top of a woman as others flee the festival.David Becker/Getty Images

15 of 21

An injured person is tended to in the intersection of Tropicana Ave. and Las Vegas Boulevard just after the shooting.Ethan Miller/Getty Images

16 of 21

A person takes cover at the Route 91 Harvest country music festival.David Becker/Getty Images

17 of 21

People are directed to rides outside the festival grounds after the shooting.Ethan Miller/Getty Images

18 of 21

People tend to the wounded in the wake of the shooting.David Becker/Getty Images

19 of 21

A body lays covered in the driveway of the Desert Rose resort on Reno Ave. in the aftermath of the shooting.Marcus Yam/Los Angeles Times via Getty Images

20 of 21

Discarded personal items covered in blood sit on Kovaln Lane in the aftermath of the shooting.Marcus Yam/Los Angeles Times via Getty Images

On Sunday night, a gunman named Stephen Paddock opened fire on the crowd attending the Route 91 Harvest Festival in Las Vegas, killing more than 59 and leaving at least 527 injured. The event is now the deadliest mass shooting in American history.

Shortly after 10 p.m., Paddock began firing hundreds of bullets into the crowd from a 32nd-floor window at the nearby Mandalay Bay hotel, reports CNN.

Another witness, Taylor Benge, told CNN that Paddock fired between 200 and 300 bullets. "My sister, being as noble as she is, threw herself on top of me and said, 'I love you, Taylor,' Benge said. "Even after an hour and 30 minutes, I didn't know if I was safe."

Not long after the shooting began, Las Vegas police located Paddock's room in the Mandalay Bay hotel. They exchanged gunfire with Paddock before preparing to breach the door. When they entered, they found Paddock dead and a cache of 23 weapons in the room. Authorities believe that Paddock killed himself prior to the officers' entry.

As of now, officials have little to report on the 64-year-old Nevada man, a retired accountant, and his motives. He has no prior criminal history and appears to have no connection to any terror groups foreign or domestic.